USGS Coastal & Marine Geology
Wong, F.L., Hamer, M.R., Hampton, M.A., and Torresan, M.E., 1996, Bottom Characteristics of an Ocean Disposal Site off Honolulu, Hawaii: Time-based Navigational Trackline Data Managed by Routes and Events: Redlands, California, Environmental Systems Research Institute, 1996 ESRI Users Conference Proceedings (cdrom), approx. 15 p.

Figure 6. Types of sea-bottom morphology observed in still photographs. North is up. Conversion of the linear events (time span when one particular morphology was observed) to point events permits display of phenomena that may only be observed at a single 1-minute time fix (20-40 m along track, depending on ship speed), which is the case at several points along the east half of camera line 9. Asymmetrical ripples (green, cyan) help determine an absolute current direction. Symmetrical ripples (red, magenta) provide the alignment of the current (for example, N-S), but not the absolute direction. See Figures 5 and 7. Numbers are camera trackline numbers. Water depth is approximately 500 m.

Sea bottom types.

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Maintainer: Florence L. Wong
Last modified: 01 Oct 97.

U.S. Department of the Interior, U.S. Geological Survey, Western Coastal and Marine Geology